Scenario I am working on an application that needs to make use of
Your iOS app does not need to contain an SSL certificate. Instead, it is the server that needs an SSL certificate. On the iOS app side you only need to replace the http:// URL with an https:// URL. When your app makes the https connection to the server iOS's networking code will check the validity of the server's certificate, so you can be confident that you are communicating with the right server. Anything you send over the https connection will be protected from eavesdropping by encryption.
You can test whether the server has a certificate by entering its https:// URL into a web browser. If the browser displays a lock icon, the server has a valid certificate. You can click on the lock icon for more information about the server's certificate.